199960438 has 4 divisors (see below), whose sum is σ = 299940660. Its totient is φ = 99980218.

The previous prime is 199960433. The next prime is 199960471. The reversal of 199960438 is 834069991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834069991 = 277 ⋅3011083.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 199960391 and 199960400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199960433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49990108 + ... + 49990111.

It is an arithmetic number, because the mean of its divisors is an integer number (74985165).

Almost surely, 2^199960438 is an apocalyptic number.

199960438 is a deficient number, since it is larger than the sum of its proper divisors (99980222).

199960438 is an equidigital number, since it uses as much as digits as its factorization.

199960438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99980221.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 199960438 is about 14140.7368266297. The cubic root of 199960438 is about 584.7649851032.

The spelling of 199960438 in words is "one hundred ninety-nine million, nine hundred sixty thousand, four hundred thirty-eight".